/* Copyright (c) 2008, John Cronin
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the copyright holder nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

#include "console.h"
#include "malloc.h"
#include "bzip2-1.0.5/bzlib.h"

#define DEST_LEN	0x200000

void bz_internal_error(int errcode)
{
	_puts("libbz2 internal error: ", 0);
	puthex(errcode);
	_puts("", 1);
}

void *uncompress_bzipped_kernel(void *compressed_data, unsigned int len)
{
	/* uncompress a kernel compressed with bzip */

	int ret;
	unsigned int dest_len = DEST_LEN;
	void *dest = malloc(dest_len);

	puts("Decompressing kernel...");

#ifdef _DEBUG
	_puts("comp_data: ", 0);
	puthex((unsigned long int)compressed_data);
	_puts("  length: ", 0);
	puthex(len);
	_puts("", 1);
	_puts("dest:      ", 0);
	puthex((unsigned long int)dest);
	_puts("  length: ", 0);
	puthex(dest_len);
	_puts("", 1);
#endif
	ret = BZ2_bzBuffToBuffDecompress((char *)dest, &dest_len, (char *)compressed_data, len, 0, 0);

	if(ret == BZ_OK)
		return dest;
	else {
		_puts("Error: decompressing error ", 0);
		puthex(ret);
		_puts("", 1);
		return compressed_data;
	}
}
